no... other phone also can...
but to fully enjoy webe network, using their certified phone is recommended..
think you can check this out.
I'm Jon, I know nothing
Answer depends. you can use their mobile line as long as you have a phone but you will not be able to enjoy and experience their LTE network at its optimal level. This is because their network is different from the rest of the telco. newer phones carry broader bandwidth specs. So, if you want to experience LTE, then yes, you must have a certified phone